Does anyone know how important the advice is about sleeping on your side during pregnancy? I just can't do it, I usually sleep flat on my back, although I can just about fall asleep on my side I wake up either cramped and irritable a few hours later, or wake up on my back - and then I can't go back to sleep again, if i've slept on my side it's because i'm achey, if I wake up on my back its because i'm worrying about the damage I may have done to the baby!! Help - is it more important to get a good nights sleep or to sleep on my side?